Blow-pipe



(No Model.)

AM. H. KNAPP.

BLOW PIPE.

Patented July 19,1881.

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n. Pneus, mum www nr.

new' and useful improvements in blow-pipes,

, UNITED STATES BLOW-PIPE.

PATENT OFFICE.

MIL'roN H. KNAPP, on ADRIAN, MICHIGAN.

SPECIFICATION forming partof` Letters Patent No. 244,623, dated July I9,1881.

- Application iiled May 4, 1%81. (No model.) l

To all whom it may concern:

Be it known-that I, MILTON VH. KNAPP, of Adrian, in the county ofLenawee and State of Michigan, have invented new and useful Improvementsin Blow-Pipes, of which the following is a specification. v

The nature of myinvention relates to certain such as are usuallyemployed by dentists and jewelers, by means of lwhich variousadjustments are obtained which will-be found of great practical utility,and by which various sizes of iiame and intensity of the same can behad, or compound flames can be produced, as the varying conditions ofthe work in hand may render desirable.

The invention consists in the peculiar construction of the parts andtheir various com,- binations, as more fully hereinafter described.

Figure lis an elevation of my improved compound blow-pipe, partially insection. Fig. 2 is a detached perspective of the stand with the crotchedor forked blow-pipe attached. Fig. 3 is a-central section of the burnerattached to the standard by the universal joint.

In the accompanying drawings, which form a part'ot` this specification,A is a metal base, of proper size and weight to give a firm and steadysupport to the parts attached thereto. B is a hollow arm or tube, whichprojects horizontally from this base, and is provided with the stop-cockC.' The tube B communicates with the vertical tube D, which containsa'jcttip, E. The tube-burner F, which is screwed upon the tube D,contains air-inlets c, slightly above the tip E, and serves also assupport to the crucible-holder G.

H is an air-blast tube adjustably secured to the base A by the screw bpassing through the slotted plate c. The upper end of the tube H isbifurcated, as shown in Fig. 2, the bifurcations leading up on oppositesides of the tube F and terminate in' two jet-tips, d d.

The hollow arm or tube B serves as a support to the hollow standard I,which is adjustably secured thereon byla set-screw, c. J is anotherstandard, adjustably secured in the hollow standard I-by means of aset-screw, f.

K is a gas-tube, which joins the standard J at g, from which point upthe standard J is also hollow, and forms a continuation for the tube K,and is provided with the stop-cock L, and swiveLM, connecting thestandard J with .the pipe N. The pipe N, which is shown in Fig.

3 in section, is slipped into the tube-burner P 55 and terminates in atip, O.

vSecured alongside the tube-burner N, and forming a slight angletherewith, is the blastpipe Q, which enters likewise the tube P andterminates at It. inlets h, and its openin g t' can, by the adjust-Aments above described, be brought in proximity to a crucible restingupon the holder G, Fig. l.

S isa tube conveying another air-blast through the jet-tip t to theblow-pipe iiame issuing at i.- This pipe S is adj ustably and reinovably secured upon the pipe N by means of the lug fm' and set-screwo, which latter engages in a slot, a, of the lug p secured to the tubeN. 7o

T is a iiexible tube conveying the air-blast through the b ranch-tubesV, W, and U to the blast-jet-s before described.

X is a stop-cock in the flexible main tube T,

and r another stop-cock in the branch tube W. 7 5- Z is a exible tubeconveying the gas to the burner F, while a branch tube, Y, provides theburner P.

In practice, the gas `being turned on and ignited at the burners, andthe crucible contain- 8o ing the material to be `operated upon set intothe basket G, any' desired blowpipe iiame. can be obtained by adjustingthe blast-tubes S and H by means ofthe adjustments before described. Theblastissuing through the tube 8 5 'E at d d can be obtained in a ringform by lowering the tube H, so as to make the blast impinge against thesides of the burner-tube P before arriving atthe frame. By raising thetube H a pointed iame is obtained, as the jets d d are slightlyconverging. The blast from the blow-pipe S can be directed upon theblowpipe flame issuing at 'i at any desired point, so as to concentratetheheat and produceapointed iarne, or a touchof the hand can remove itwithout disturbing the other adjustments. The

pipe N is also entirely under control of the hand, and can be adjustedupon the Work or removed without disturbing the other burner.

' As the entire effect of .the two blow-pipes IOO The tube P containsalso air- 6o can be concentrated upon the work a very high degree ofheat can be obtained, while at the.

which means a larger quantity of mixed gas can be obtained,substantially as described.

3. The combination of the burner P and the inclosed blow-pipe Q with theadjustable blowpipe S, substantially as set forth.

4. The combination of the burners F, provided With a blow-pipe, H, andthe adjustable burner P, provided with the adjustable blowpipe S, whenarranged and constructed substantially as specified.

MILTON H. KNAPP.

Witnesses R. B. RoBBrNs, J. C. WINNIE.

